Cisco Catalyst 2960 Command Reference Manual page 333

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Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

This is an example of output from the show interfaces interface-id command when TDR is running:

Switch# show interfaces gigabitethernet0/2

gigabitethernet0/2 is up, line protocol is up (connected: TDR in Progress)

This is an example of output from the show cable-diagnostics tdr interface interface-id command when

TDR is not running:

Switch# show cable-diagnostics tdr interface gigabitethernet0/2

% TDR test was never issued on Gi0/2

If an interface does not support TDR, this message appears:

% TDR test is not supported on switch 1

Related Commands

test cable-diagnostics tdr

Fields Descriptions for the show cable-diagnostics tdr Command Output (continued)

Location on the cable where the problem is, with respect to your switch. TDR can

only find the location in one of these cases:

The cable is properly connected, the link is up, and the interface speed is

The cable is open.

The cable has a short.

Name of the pair of wires to which the local pair is connected. TDR can learn about

the remote pair only when the cable is properly connected and the link is up.

The status of the pair of wires on which TDR is running:

Normal—The pair of wires is properly connected.

Not completed—The test is running and is not completed.

Not supported—The interface does not support TDR.

Open—The pair of wires is open.

Shorted—The pair of wires is shorted.

Enables and runs TDR on an interface.

show cable-diagnostics tdr

Catalyst 2960 Switch Command Reference

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